Dentimeter.



- witnesses 1101855.875. I PATENTBD JUNE 4, 1907. r

- J. BoDE.

DENTIMBTER.

APPLICATION FILED JAN. 13, 1907.

UNlTED STATES PA'rENfI` OEEIOE.

JOSEPH BODE, OP PHILADELPHIA, PENNSYLVANIA, ASSIGNOE To IJAMES w.

IVORY, OF PHILADELPHIA, PENNSYLVANIA.

DENTINIETER.

Speccaton of Letters Patent.

Patented June 4, 1907.

Application filed January 18, 1907.- Serial No. 352,865.

To all whom, t may concern: .van

Be it known that I, JOSEPH Bonn, a citizen of the United States,residing in the city and county of Philadelphia, State of Pennsylvania,have invented a new and useful Dentimeter, of which the following is aspecification.

My invention consists of a dentimeter or a device for measuring a toothso as to determine the Size of a crown that may be required forapplication to the tooth.

Figure l represents a longitudinal section of a dentimeter embodying myinvention. Figs. 2 and 3 represent side elevations of portions of thesaine on an enlarged scale, one being at a right angle to the other.Fig. 4 represents a top or plan view of the measuring member produced.Fig. 5 represents a longitudinal Section of another form of the device.

Similar letters of reference indicate corresponding parts in thefigures.

Referring to the drawings: A designates a casing within which is thesliding rod B, in an Opening C -of which is fitted the Screw D, thelatter being swiveled in said casing, and connected with the milled headE occupying the end of the exterior of the casing and serving to rotatesaid screw and thereby impart sliding motions to the rod, it beingnoticed that said rod is prevented from rotation by means of the pin orstud F which passes through the casing A and freely enters thelongitudinally extending groove or recess G in said rod.

Connected with the end of the rod, opposite to the screw D is the stockH, which eX- tends forwardly therefrom and projects outside of thecasing. In said casing are openings J, and in said stock is an openingK, the same extending transversely through the respective parts andbeing adapted to receive the piece L of wire or other suitable material,which is properly bent to form, at the outer terminal of the Stock, theloop M, and has certain portions passed through Said openings J and Kand its ends secured by twisting or other means after being passedthrough said openings J.

It will now be seen that the loop M is placed around a tooth which is tobe measured when the head E is rotated, vwhereby the rod and stock areoperated to push the wire so as to close the loop snugly on the tooth,it being noticed that the wire is crossed in the-openingK where its endsare tightly held by being twisted as at N on the exterior'ofthe casingafter they emerge from the openings J. Said loop iS then severed at anysuitable place, as shown in Fig. 5, whereby while carried on the stockit may be removed from the tooth, when the length of the severed partsof the loop may be measured or the ends of the severed parts are broughttogether, thus again closing the loop, when the diameter of the latteris measured so as to determine the size of a crown that it is desirableto apply to the tooth. When the head -E is rotated in proper direction,the stock is drawn in, when the wire may be easily removed and a freshpiece substituted for the same.

Attention is directed to the fact that the wire appears on the exteriorof the stock and casing, by which provision it may be readily handledand manipulated and its operation perceived and watched, thus producingsuperior results. Furthermore, the construction avoids both theinconvenient threading of the wire through the casing and the removal ofthe stock for the purpose of loeating said wire.

In order to move the stock close to a tooth and prevent the slipping ofthe loop, the end of the Stock has a recess or notch Hf therein, thesame having the crossed portions of the wire seated therein, the effectof which is evident.

In Fig. 5 I Show another form of the dentimeter, wherein a spring N isinterposed between a shoulder F and the rod B and a collar Q in theforward end of the casing A', so that when the stock is advanced saidspring is compressed and contracted, it being noticed that the screw Dwhich operates said rod B is disconnected from said rod, consesequentlywhen the headv E is rotated in the reverse direction to that required toadvance the stock, the rod B is subject to the string N, whichexpanding, resses in said rod and so withdraws the stocl as it followssaid rod, placing ,the stock in normal position for removal of the cutor severed piece of wire and substitution therefor of a fresh piece.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent, is

l. A dentimeter having a loop of pliable l material connected therewith,the same being adapted to be fitted on a tooth, and means for tighteningsaid loop thereon said means being adapted to have the adjacent lengtholil said piece and the ends thereof, and the fastenings of the latter,on the exterior of I the device.

2. A dentimeter composed of a movable member, a casing therefor, meansfor operating said member in opposite directions, and openings in saidmember and casing for attaching a loop-forming ieee of material I'thereto, whereby the resuljtant loop may be fitted on a tooth andtightened thereon and portions of the Wire may occupy the exterior ofsaid stock and be secured on the exterior 15 I member, a casingtherefor, means for attaching a piece of loop-forming material to saidcasing and member, and a recess in the end of 2o said member Where saidmaterial is crossed for preventing the resultant loop from slipping,r onsaid member and placing the latter close to a tooth.

JOSEPH BODE. Witnesses: JOHN A. WIEDERSHEIM, WM. CANER WIEDERSEIM.

